Hi! Svein.
I've just arrived home from Sweden having done a "near touch and go" in the
737/800 !!!!
Then spending 3/4hr in hold pattern over Alexandra Palace. and on final
heavy landing with the entourage of fire engines following down the runway!
No explanation other than an apology for the heavy but "within limits"
landing except for "technical checks" ?(Probably hydraulic brakes warning
light judging by the time the reverse thrust was on !)
However inspite of your message about dimensions I guessed that my trailer
dimensions would be of interest.
In plan view it is dart shaped at both ends(the rear being box type doors.)
Distance from the tow hitch to front access door is 29"
Width of front door assembly is 23"
>Front dart shape ends 92" behind the tow hitch.(where the trailer is
widest )
Aircraft tail wheel pivot is 65" behind the tow hitch.
Tow hitch to C/L of front axle is 150"
Distance between C/L of two axles is 27" (manufacturers recommend reducing
this by 6" to save scrubbing when turning tight circles)(Tyres are
155/70R12" rims)
Overall distance over outside of ramps 79" (recommend 80")
Distance of rear Axle C/L to hinges of ramps 44"
Central ramp is 36" (with bottle screws and chains to load the nose wheel
upwards setting the tailwheel pivot hard on the trailer floor, making the
aircraft sit therefore on four points. it is also fitted with a wooden chock
which then holds the a/c main gear against its rear chocks in the running
ramps)
Maingear ramps are 40" long with fold over extensions to accomodate the dart
shape of the rear doors.
Length of the rear doors is 65"
Length of parallel portion of widest part of trailer is 127"
Width of doors over the rear (dart shape) 67"
Overall height of roof of trailer above its floor 75"
Height of trailer floor above the ground approx.13"
The rear top of the doors are raised by approx. 12" (to accomodate the three
blade propeller with the aircraft tied tail down)
The dimensional height of the aft of the rear doors is 67"(Not above the
ground dimension)
You will need to consider the location of the whole centre of gravity of
trailer and load and arrange it to be just in front of the axle assembly
centre line otherwise the trailer will "snake" continously.
The axles I have used are "Avon" and are cross linked for load equalisation.
The dimensions given above only just satisfy this requirement with the nose
wheel lifted hard against the tail wheel pivot.
Of course this begins to change with fuel on board and the location of the
wings in the trailer sides.
It is of heavy construction so doesn't bounce and things therefor do not
need tying down (damage of GRP parts can just as likely ensue from tie downs
with bouncing as supports.
There should be a picture of the trailer on the
www.crixbinfield.freeserve.co.uk/europa.htm support site under my name and
G-PTAG courtesy John Cliff.
Hope this all helps you with your construction.
BTW We are planning a trip to Tromso between Barkaby Fly In, end of May
early June and the Stauning Denmark Fly In the following weekend.
Best regards
Bob Harrison G-PTAG
-----Original Message-----
From: forum-owner@europaclub.org.uk
Johnsen
Subject: Tri-Gear Main wheels width
All tri-gear builders/flyers:
I am planning to have a trailer built, and for certain reasons it may
preferably have to be built before I have installed the main gear on my own
aircraft. The free clearance inside the trailer wheels is of course a
critical dimension.
I would appreciate very much to receive some actual measurements of the
extreme width on the outside of the main wheels (without speed fairings
installed).
Regards,
Svein K. Johnsen
A225 (now in Norway)
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